The Sazh

When a brand-new cornerstone and a creepy monk appear, no one has any answers - least of all Rook, who seems to have chosen this time to take an extended nap. With Zumar gone, Tomash overwhelmed, Raine in disgrace, and Tondra and Alan dealing with their own issues, Lorcas is left wondering who he can turn to for help. Detective Jason Japert may be the answer - or he may be a double-agent. One thing is certain: there's a showdown coming. But will it be with Jack Bright and the Knights, with a secret faction of the Fell Ken, or even with Rook himself?

This is Book 4, the final installment of the Cornerstone series, following 'Raising Rook', 'The Delving', and 'The Wellspring'.